Iron exhibits bcc structure at room temperature. Above 900^° C, it transforms to fcc structure. The ratio of density of iron at room temperature to…

Iron exhibits bcc structure at room temperature. Above $\displaystyle 900^{\circ} \mathrm{C}$, it transforms to fcc structure. The ratio of density of iron at room temperature to that at $\displaystyle 900^{\circ} \mathrm{C}$ (assuming molar mass and atomic radii of iron remains constant with temperature) is